Lost white cat in London — Alert #1937

Our cat Smartie is STILL MISSING. We last saw him outside our house on the afternoon of Friday 11th September. He lives in Sutcliffe Road on Plumstead Common, SE London. He is 15 years old, a large fluffy cat, and not very athletic. He is chipped. We are very worried about him. A £100 reward is offered for his return. He is a large fluffy cat, with a white tummy, legs, and face and a tabby back and a thick tabby tail. Please, if you live in the area, can you check your gardens, front and back, and sheds or other places into which he may have become trapped. Or did he jump into your van or car when you were nearby? We are desperate as it has been over a week and time is running out for him